diff --git a/src/main/common/printf.c b/src/main/common/printf.c
index 76625cdc66..db9467f8f7 100644
--- a/src/main/common/printf.c
+++ b/src/main/common/printf.c
@@ -34,6 +34,7 @@
 #include <stdarg.h>
 #include <stdlib.h>
 
+#include "build_config.h"
 
 #include "drivers/serial.h"
 #include "io/serial.h"
@@ -176,6 +177,7 @@ void tfp_sprintf(char *s, char *fmt, ...)
 
 static void _putc(void *p, char c)
 {
+    UNUSED(p);
     serialWrite(printfSerialPort, c);
 }
 
diff --git a/src/main/config/config.c b/src/main/config/config.c
index 29e6d1af67..ceb2aa7202 100755
--- a/src/main/config/config.c
+++ b/src/main/config/config.c
@@ -28,6 +28,8 @@
 
 #include "drivers/accgyro.h"
 #include "drivers/system.h"
+#include "drivers/gpio.h"
+#include "drivers/timer.h"
 #include "drivers/pwm_rx.h"
 
 #include "sensors/sensors.h"
diff --git a/src/main/drivers/barometer_bmp085.c b/src/main/drivers/barometer_bmp085.c
index 892071120d..e651d951af 100755
--- a/src/main/drivers/barometer_bmp085.c
+++ b/src/main/drivers/barometer_bmp085.c
@@ -102,7 +102,7 @@ typedef struct {
 #define SMD500_PARAM_MH     -7357        //calibration parameter
 #define SMD500_PARAM_MI      3791        //calibration parameter
 
-static bmp085_t bmp085 = { { 0, } };
+static bmp085_t bmp085;
 static bool bmp085InitDone = false;
 static uint16_t bmp085_ut;  // static result of temperature measurement
 static uint32_t bmp085_up;  // static result of pressure measurement
diff --git a/src/main/drivers/pwm_mapping.c b/src/main/drivers/pwm_mapping.c
index 47ba27664c..e5e7c62298 100755
--- a/src/main/drivers/pwm_mapping.c
+++ b/src/main/drivers/pwm_mapping.c
@@ -265,6 +265,8 @@ pwmOutputConfiguration_t *pwmInit(drv_pwm_config_t *init)
         if (setup[i] == 0xFFFF) // terminator
             break;
 
+        const timerHardware_t *timerHardwarePtr = &timerHardware[timerIndex];
+
 #ifdef OLIMEXINO_UNCUT_LED2_E_JUMPER
         // PWM2 is connected to LED2 on the board and cannot be connected unless you cut LED2_E
         if (timerIndex == PWM2)
@@ -310,7 +312,7 @@ pwmOutputConfiguration_t *pwmInit(drv_pwm_config_t *init)
 
 #ifdef LED_STRIP_TIMER
         // skip LED Strip output
-        if (init->useLEDStrip && timerHardware[timerIndex].tim == LED_STRIP_TIMER)
+        if (init->useLEDStrip && timerHardwarePtr->tim == LED_STRIP_TIMER)
             continue;
 #endif
 
@@ -353,19 +355,19 @@ pwmOutputConfiguration_t *pwmInit(drv_pwm_config_t *init)
         }
 
         if (type == TYPE_IP) {
-            ppmInConfig(timerIndex);
+            ppmInConfig(timerHardwarePtr);
         } else if (type == TYPE_IW) {
-            pwmInConfig(timerIndex, channelIndex);
+            pwmInConfig(timerHardwarePtr, channelIndex);
             channelIndex++;
         } else if (type == TYPE_M) {
             if (init->motorPwmRate > 500) {
-                pwmBrushedMotorConfig(&timerHardware[timerIndex], pwmOutputConfiguration.motorCount, init->motorPwmRate, init->idlePulse);
+                pwmBrushedMotorConfig(timerHardwarePtr, pwmOutputConfiguration.motorCount, init->motorPwmRate, init->idlePulse);
             } else {
-                pwmBrushlessMotorConfig(&timerHardware[timerIndex], pwmOutputConfiguration.motorCount, init->motorPwmRate, init->idlePulse);
+                pwmBrushlessMotorConfig(timerHardwarePtr, pwmOutputConfiguration.motorCount, init->motorPwmRate, init->idlePulse);
             }
             pwmOutputConfiguration.motorCount++;
         } else if (type == TYPE_S) {
-            pwmServoConfig(&timerHardware[timerIndex], pwmOutputConfiguration.servoCount, init->servoPwmRate, init->servoCenterPulse);
+            pwmServoConfig(timerHardwarePtr, pwmOutputConfiguration.servoCount, init->servoPwmRate, init->servoCenterPulse);
             pwmOutputConfiguration.servoCount++;
         }
     }
diff --git a/src/main/drivers/pwm_rx.c b/src/main/drivers/pwm_rx.c
index a79bb24894..6111d7b9e2 100644
--- a/src/main/drivers/pwm_rx.c
+++ b/src/main/drivers/pwm_rx.c
@@ -21,6 +21,7 @@
 #include <stdlib.h>
 
 #include "platform.h"
+#include "build_config.h"
 
 #include "gpio.h"
 #include "timer.h"
@@ -129,11 +130,13 @@ static void ppmInit(void)
 
 static void ppmOverflowCallback(uint8_t port, captureCompare_t capture)
 {
+    UNUSED(port);
     ppmDev.largeCounter += capture;
 }
 
 static void ppmEdgeCallback(uint8_t port, captureCompare_t capture)
 {
+    UNUSED(port);
     int32_t i;
 
     /* Shift the last measurement out */
@@ -212,12 +215,12 @@ static void ppmEdgeCallback(uint8_t port, captureCompare_t capture)
 static void pwmEdgeCallback(uint8_t port, captureCompare_t capture)
 {
     pwmInputPort_t *pwmInputPort = &pwmInputPorts[port];
-    const timerHardware_t *timerHardware = pwmInputPort->timerHardware;
+    const timerHardware_t *timerHardwarePtr = pwmInputPort->timerHardware;
 
     if (pwmInputPort->state == 0) {
         pwmInputPort->rise = capture;
         pwmInputPort->state = 1;
-        pwmICConfig(timerHardware->tim, timerHardware->channel, TIM_ICPolarity_Falling);
+        pwmICConfig(timerHardwarePtr->tim, timerHardwarePtr->channel, TIM_ICPolarity_Falling);
     } else {
         pwmInputPort->fall = capture;
 
@@ -227,7 +230,7 @@ static void pwmEdgeCallback(uint8_t port, captureCompare_t capture)
 
         // switch state
         pwmInputPort->state = 0;
-        pwmICConfig(timerHardware->tim, timerHardware->channel, TIM_ICPolarity_Rising);
+        pwmICConfig(timerHardwarePtr->tim, timerHardwarePtr->channel, TIM_ICPolarity_Rising);
     }
 }
 
@@ -260,12 +263,10 @@ void pwmICConfig(TIM_TypeDef *tim, uint8_t channel, uint16_t polarity)
     TIM_ICInit(tim, &TIM_ICInitStructure);
 }
 
-void pwmInConfig(uint8_t timerIndex, uint8_t channel)
+void pwmInConfig(const timerHardware_t *timerHardwarePtr, uint8_t channel)
 {
     pwmInputPort_t *p = &pwmInputPorts[channel];
 
-    const timerHardware_t *timerHardwarePtr = &(timerHardware[timerIndex]);
-
     p->channel = channel;
     p->mode = INPUT_MODE_PWM;
     p->timerHardware = timerHardwarePtr;
@@ -280,14 +281,12 @@ void pwmInConfig(uint8_t timerIndex, uint8_t channel)
 #define UNUSED_PPM_TIMER_REFERENCE 0
 #define FIRST_PWM_PORT 0
 
-void ppmInConfig(uint8_t timerIndex)
+void ppmInConfig(const timerHardware_t *timerHardwarePtr)
 {
     ppmInit();
 
     pwmInputPort_t *p = &pwmInputPorts[FIRST_PWM_PORT];
 
-    const timerHardware_t *timerHardwarePtr = &(timerHardware[timerIndex]);
-
     p->mode = INPUT_MODE_PPM;
     p->timerHardware = timerHardwarePtr;
 
diff --git a/src/main/drivers/pwm_rx.h b/src/main/drivers/pwm_rx.h
index f16fa54d14..5edd7041cd 100644
--- a/src/main/drivers/pwm_rx.h
+++ b/src/main/drivers/pwm_rx.h
@@ -22,8 +22,8 @@ typedef enum {
     INPUT_FILTERING_ENABLED
 } inputFilteringMode_e;
 
-void ppmInConfig(uint8_t timerIndex);
-void pwmInConfig(uint8_t timerIndex, uint8_t channel);
+void ppmInConfig(const timerHardware_t *timerHardwarePtr);
+void pwmInConfig(const timerHardware_t *timerHardwarePtr, uint8_t channel);
 
 uint16_t pwmRead(uint8_t channel);
 
diff --git a/src/main/drivers/serial_softserial.c b/src/main/drivers/serial_softserial.c
index cdf06604c7..0bde19164c 100644
--- a/src/main/drivers/serial_softserial.c
+++ b/src/main/drivers/serial_softserial.c
@@ -21,6 +21,8 @@
 
 #include "platform.h"
 
+#include "build_config.h"
+
 #include "system.h"
 #include "gpio.h"
 #include "timer.h"
@@ -312,6 +314,7 @@ void processRxState(softSerial_t *softSerial)
 
 void onSerialTimer(uint8_t portIndex, captureCompare_t capture)
 {
+    UNUSED(capture);
     softSerial_t *softSerial = &(softSerialPorts[portIndex]);
 
     processTxState(softSerial);
@@ -320,6 +323,8 @@ void onSerialTimer(uint8_t portIndex, captureCompare_t capture)
 
 void onSerialRxPinChange(uint8_t portIndex, captureCompare_t capture)
 {
+    UNUSED(capture);
+
     softSerial_t *softSerial = &(softSerialPorts[portIndex]);
 
     if ((softSerial->port.mode & MODE_RX) == 0) {
diff --git a/src/main/drivers/serial_uart.c b/src/main/drivers/serial_uart.c
index d16de124e7..60f02036de 100644
--- a/src/main/drivers/serial_uart.c
+++ b/src/main/drivers/serial_uart.c
@@ -26,6 +26,8 @@
 
 #include "platform.h"
 
+#include "build_config.h"
+
 #include "serial.h"
 #include "serial_uart.h"
 
@@ -57,6 +59,7 @@ static void uartReconfigure(uartPort_t *uartPort)
 
 serialPort_t *uartOpen(USART_TypeDef *USARTx, serialReceiveCallbackPtr callback, uint32_t baudRate, portMode_t mode, serialInversion_e inversion)
 {
+    UNUSED(inversion);
     DMA_InitTypeDef DMA_InitStructure;
 
     uartPort_t *s = NULL;
diff --git a/src/main/flight/altitudehold.c b/src/main/flight/altitudehold.c
index 5c9acfb32b..5c04d52ee4 100644
--- a/src/main/flight/altitudehold.c
+++ b/src/main/flight/altitudehold.c
@@ -26,6 +26,8 @@
 
 #include "drivers/accgyro.h"
 #include "drivers/serial.h"
+#include "drivers/gpio.h"
+#include "drivers/timer.h"
 #include "drivers/pwm_rx.h"
 
 // FIXME remove dependency on currentProfile and masterConfig globals and clean up include file list.
diff --git a/src/main/flight/flight.c b/src/main/flight/flight.c
index 47a574c824..2a1e9f11fb 100644
--- a/src/main/flight/flight.c
+++ b/src/main/flight/flight.c
@@ -19,6 +19,8 @@
 #include <stdint.h>
 #include <math.h>
 
+#include "build_config.h"
+
 #include "common/axis.h"
 #include "common/maths.h"
 
@@ -178,6 +180,8 @@ static void pidMultiWii(pidProfile_t *pidProfile, controlRateConfig_t *controlRa
     int32_t deltaSum;
     int32_t delta;
 
+    UNUSED(controlRateConfig);
+
     // **** PITCH & ROLL & YAW PID ****
     prop = max(abs(rcCommand[PITCH]), abs(rcCommand[ROLL])); // range [0;500]
     for (axis = 0; axis < 3; axis++) {
diff --git a/src/main/flight/mixer.h b/src/main/flight/mixer.h
index 285ed46489..ef71e4eb31 100644
--- a/src/main/flight/mixer.h
+++ b/src/main/flight/mixer.h
@@ -79,7 +79,7 @@ typedef struct airplaneConfig_t {
     uint8_t flaps_speed;                    // airplane mode flaps, 0 = no flaps, > 0 = flap speed, larger = faster
 } airplaneConfig_t;
 
-#define CHANNEL_FORWARDING_DISABLED 0xFF
+#define CHANNEL_FORWARDING_DISABLED (uint8_t)0xFF
 
 typedef struct servoParam_t {
     int16_t min;                            // servo min
diff --git a/src/main/io/gps.c b/src/main/io/gps.c
index 61981979b8..dde95d7362 100644
--- a/src/main/io/gps.c
+++ b/src/main/io/gps.c
@@ -412,10 +412,10 @@ static void GPS_calc_longitude_scaling(int32_t lat);
 static void GPS_calc_velocity(void);
 static void GPS_calc_location_error(int32_t * target_lat, int32_t * target_lng, int32_t * gps_lat, int32_t * gps_lng);
 static void GPS_calc_poshold(void);
-static void GPS_calc_nav_rate(int max_speed);
+static void GPS_calc_nav_rate(uint16_t max_speed);
 static void GPS_update_crosstrack(void);
 static bool UBLOX_parse_gps(void);
-static int16_t GPS_calc_desired_speed(int16_t max_speed, bool _slow);
+static uint16_t GPS_calc_desired_speed(uint16_t max_speed, bool _slow);
 
 static int32_t wrap_18000(int32_t error);
 static int32_t wrap_36000(int32_t angle);
@@ -554,7 +554,7 @@ static void gpsNewData(uint16_t c)
     static uint32_t nav_loopTimer;
     uint32_t dist;
     int32_t dir;
-    int16_t speed;
+    uint16_t speed;
 
     if (gpsNewFrame(c)) {
         // new data received and parsed, we're in business
@@ -884,7 +884,7 @@ static void GPS_calc_poshold(void)
 ////////////////////////////////////////////////////////////////////////////////////
 // Calculate the desired nav_lat and nav_lon for distance flying such as RTH
 //
-static void GPS_calc_nav_rate(int max_speed)
+static void GPS_calc_nav_rate(uint16_t max_speed)
 {
     float trig[2];
     float temp;
@@ -938,7 +938,7 @@ static void GPS_update_crosstrack(void)
 //                 |                                        +|+
 //                 |< we should slow to 1.5 m/s as we hit the target
 //
-static int16_t GPS_calc_desired_speed(int16_t max_speed, bool _slow)
+static uint16_t GPS_calc_desired_speed(uint16_t max_speed, bool _slow)
 {
     // max_speed is default 400 or 4m/s
     if (_slow) {
diff --git a/src/main/io/serial.c b/src/main/io/serial.c
index ffe0905b42..ffe29aa0cd 100644
--- a/src/main/io/serial.c
+++ b/src/main/io/serial.c
@@ -22,6 +22,8 @@
 
 #include "platform.h"
 
+#include "build_config.h"
+
 #include "drivers/system.h"
 #include "drivers/gpio.h"
 #include "drivers/timer.h"
@@ -88,7 +90,7 @@ static serialPortFunction_t serialPortFunctions[SERIAL_PORT_COUNT] = {
     {SERIAL_PORT_SOFTSERIAL2, NULL, SCENARIO_UNUSED, FUNCTION_NONE}
 };
 
-const static serialPortConstraint_t serialPortConstraints[SERIAL_PORT_COUNT] = {
+static const serialPortConstraint_t serialPortConstraints[SERIAL_PORT_COUNT] = {
     {SERIAL_PORT_USART1,        9600, 115200,   SPF_NONE | SPF_SUPPORTS_SBUS_MODE },
     {SERIAL_PORT_USART2,        9600, 115200,   SPF_SUPPORTS_CALLBACK | SPF_SUPPORTS_SBUS_MODE},
     {SERIAL_PORT_SOFTSERIAL1,   9600, 19200,    SPF_SUPPORTS_CALLBACK | SPF_IS_SOFTWARE_INVERTABLE},
@@ -319,6 +321,7 @@ void beginSerialPortFunction(serialPort_t *port, serialPortFunction_e function)
 
 void endSerialPortFunction(serialPort_t *port, serialPortFunction_e function)
 {
+    UNUSED(function);
     serialPortFunction_t *serialPortFunction = findSerialPortFunctionByPort(port);
 
     serialPortFunction->currentFunction = FUNCTION_NONE;
@@ -410,7 +413,7 @@ bool isSerialConfigValid(serialConfig_t *serialConfigToCheck)
     return true;
 }
 
-bool doesConfigurationUsePort(serialConfig_t *serialConfig, serialPortIdentifier_e portIdentifier)
+bool doesConfigurationUsePort(serialPortIdentifier_e portIdentifier)
 {
     serialPortSearchResult_t *searchResult;
     const functionConstraint_t *functionConstraint;
diff --git a/src/main/io/serial.h b/src/main/io/serial.h
index 0b311ddf70..ed05bc35cf 100644
--- a/src/main/io/serial.h
+++ b/src/main/io/serial.h
@@ -152,7 +152,7 @@ void waitForSerialPortToFinishTransmitting(serialPort_t *serialPort);
 
 void applySerialConfigToPortFunctions(serialConfig_t *serialConfig);
 bool isSerialConfigValid(serialConfig_t *serialConfig);
-bool doesConfigurationUsePort(serialConfig_t *serialConfig, serialPortIdentifier_e portIdentifier);
+bool doesConfigurationUsePort(serialPortIdentifier_e portIdentifier);
 bool isSerialPortFunctionShared(serialPortFunction_e functionToUse, uint16_t functionMask);
 
 const serialPortFunctionList_t *getSerialPortFunctionList(void);
diff --git a/src/main/io/serial_cli.c b/src/main/io/serial_cli.c
index c7b9339ab3..19ab3a2a20 100644
--- a/src/main/io/serial_cli.c
+++ b/src/main/io/serial_cli.c
@@ -25,6 +25,8 @@
 
 #include "platform.h"
 
+#include "build_config.h"
+
 #include "common/axis.h"
 #include "common/typeconversion.h"
 
@@ -32,6 +34,8 @@
 #include "drivers/accgyro.h"
 #include "drivers/serial.h"
 #include "drivers/bus_i2c.h"
+#include "drivers/gpio.h"
+#include "drivers/timer.h"
 #include "drivers/pwm_rx.h"
 #include "flight/flight.h"
 #include "flight/mixer.h"
@@ -480,12 +484,14 @@ static void cliCMix(char *cmdline)
 
 static void cliDump(char *cmdline)
 {
-    int i;
+    unsigned int i;
     char buf[16];
     float thr, roll, pitch, yaw;
     uint32_t mask;
     const clivalue_t *setval;
 
+    UNUSED(cmdline);
+
     printf("Current Config: Copy everything below here...\r\n");
 
     // print out aux switches
@@ -648,6 +654,8 @@ static void cliFeature(char *cmdline)
 #ifdef GPS
 static void cliGpsPassthrough(char *cmdline)
 {
+    UNUSED(cmdline);
+
     gpsEnablePassthroughResult_e result = gpsEnablePassthrough();
 
     switch (result) {
@@ -669,6 +677,8 @@ static void cliHelp(char *cmdline)
 {
     uint32_t i = 0;
 
+    UNUSED(cmdline);
+
     cliPrint("Available commands:\r\n");
     for (i = 0; i < CMD_COUNT; i++)
         printf("%s\t%s\r\n", cmdTable[i].name, cmdTable[i].param);
@@ -809,6 +819,8 @@ static void cliReboot(void) {
 
 static void cliSave(char *cmdline)
 {
+    UNUSED(cmdline);
+
     cliPrint("Saving...");
     copyCurrentProfileToProfileSlot(masterConfig.current_profile_index);
     writeEEPROM();
@@ -817,6 +829,8 @@ static void cliSave(char *cmdline)
 
 static void cliDefaults(char *cmdline)
 {
+    UNUSED(cmdline);
+
     cliPrint("Resetting to defaults...");
     resetEEPROM();
     cliReboot();
@@ -964,6 +978,8 @@ static void cliStatus(char *cmdline)
     uint8_t i;
     uint32_t mask;
 
+    UNUSED(cmdline);
+
     printf("System Uptime: %d seconds, Voltage: %d * 0.1V (%dS battery)\r\n",
         millis() / 1000, vbat, batteryCellCount);
     mask = sensorsMask();
@@ -987,6 +1003,8 @@ static void cliStatus(char *cmdline)
 
 static void cliVersion(char *cmdline)
 {
+    UNUSED(cmdline);
+
     cliPrint("Afro32 CLI version 2.2 " __DATE__ " / " __TIME__ " - (" __FORKNAME__ ")");
 }
 
@@ -1001,7 +1019,7 @@ void cliProcess(void)
         if (c == '\t' || c == '?') {
             // do tab completion
             const clicmd_t *cmd, *pstart = NULL, *pend = NULL;
-            int i = bufferIndex;
+            uint32_t i = bufferIndex;
             for (cmd = cmdTable; cmd < cmdTable + CMD_COUNT; cmd++) {
                 if (bufferIndex && (strncasecmp(cliBuffer, cmd->name, bufferIndex) != 0))
                     continue;
diff --git a/src/main/io/serial_msp.c b/src/main/io/serial_msp.c
index 47876c32be..5c3d559258 100755
--- a/src/main/io/serial_msp.c
+++ b/src/main/io/serial_msp.c
@@ -31,6 +31,8 @@
 #include "drivers/accgyro.h"
 #include "drivers/serial.h"
 #include "drivers/bus_i2c.h"
+#include "drivers/gpio.h"
+#include "drivers/timer.h"
 #include "drivers/pwm_rx.h"
 
 #include "flight/flight.h"
@@ -911,7 +913,7 @@ static const uint8_t mspTelemetryCommandSequence[] = {
 
 void sendMspTelemetry(void)
 {
-    static int sequenceIndex = 0;
+    static uint32_t sequenceIndex = 0;
 
     cmdMSP = mspTelemetryCommandSequence[sequenceIndex];
     evaluateCommand();
diff --git a/src/main/main.c b/src/main/main.c
index 4650078a58..411933f91d 100755
--- a/src/main/main.c
+++ b/src/main/main.c
@@ -185,7 +185,7 @@ void init(void)
 
 #ifdef STM32F10X_MD
     if (!feature(FEATURE_RX_PARALLEL_PWM)) {
-        pwm_params.useUART2 = doesConfigurationUsePort(&masterConfig.serialConfig, SERIAL_PORT_USART2);
+        pwm_params.useUART2 = doesConfigurationUsePort(SERIAL_PORT_USART2);
     }
 #endif
 
diff --git a/src/main/mw.c b/src/main/mw.c
index 094d683b39..d0d9f2d0cd 100755
--- a/src/main/mw.c
+++ b/src/main/mw.c
@@ -31,6 +31,7 @@
 #include "drivers/gpio.h"
 #include "drivers/system.h"
 #include "drivers/serial.h"
+#include "drivers/timer.h"
 #include "drivers/pwm_rx.h"
 
 #include "flight/flight.h"
diff --git a/src/main/rx/msp.c b/src/main/rx/msp.c
index 4ac293abd2..be4bfe8ab8 100644
--- a/src/main/rx/msp.c
+++ b/src/main/rx/msp.c
@@ -20,6 +20,8 @@
 
 #include "platform.h"
 
+#include "build_config.h"
+
 #include "drivers/system.h"
 
 #include "drivers/serial.h"
@@ -31,8 +33,9 @@
 
 static bool rxMspFrameDone = false;
 
-static uint16_t rxMspReadRawRC(rxRuntimeConfig_t *rxRuntimeConfig, uint8_t chan)
+static uint16_t rxMspReadRawRC(rxRuntimeConfig_t *rxRuntimeConfigPtr, uint8_t chan)
 {
+    UNUSED(rxRuntimeConfigPtr);
     return rcData[chan];
 }
 
@@ -52,6 +55,7 @@ bool rxMspFrameComplete(void)
 
 bool rxMspInit(rxConfig_t *rxConfig, rxRuntimeConfig_t *rxRuntimeConfig, rcReadRawDataPtr *callback)
 {
+    UNUSED(rxConfig);
     rxRuntimeConfig->channelCount = 8; // See MSP_SET_RAW_RC
     if (callback)
         *callback = rxMspReadRawRC;
diff --git a/src/main/rx/pwm.c b/src/main/rx/pwm.c
index a7140dd938..e279a8461a 100644
--- a/src/main/rx/pwm.c
+++ b/src/main/rx/pwm.c
@@ -21,8 +21,12 @@
 
 #include <string.h>
 
+#include "build_config.h"
+
 #include "platform.h"
 
+#include "drivers/gpio.h"
+#include "drivers/timer.h"
 #include "drivers/pwm_rx.h"
 
 #include "config/config.h"
@@ -30,21 +34,23 @@
 #include "rx/rx.h"
 #include "rx/pwm.h"
 
-static uint16_t pwmReadRawRC(rxRuntimeConfig_t *rxRuntimeConfig, uint8_t chan)
+static uint16_t pwmReadRawRC(rxRuntimeConfig_t *rxRuntimeConfigPtr, uint8_t chan)
 {
+    UNUSED(rxRuntimeConfigPtr);
     return pwmRead(chan);
 }
 
-void rxPwmInit(rxRuntimeConfig_t *rxRuntimeConfig, rcReadRawDataPtr *callback)
+void rxPwmInit(rxRuntimeConfig_t *rxRuntimeConfigPtr, rcReadRawDataPtr *callback)
 {
+    UNUSED(rxRuntimeConfigPtr);
     // configure PWM/CPPM read function and max number of channels. serial rx below will override both of these, if enabled
     *callback = pwmReadRawRC;
 
     if (feature(FEATURE_RX_PARALLEL_PWM)) {
-        rxRuntimeConfig->channelCount = MAX_SUPPORTED_RC_PARALLEL_PWM_CHANNEL_COUNT;
+        rxRuntimeConfigPtr->channelCount = MAX_SUPPORTED_RC_PARALLEL_PWM_CHANNEL_COUNT;
     }
     if (feature(FEATURE_RX_PPM)) {
-        rxRuntimeConfig->channelCount = MAX_SUPPORTED_RC_PPM_CHANNEL_COUNT;
+        rxRuntimeConfigPtr->channelCount = MAX_SUPPORTED_RC_PPM_CHANNEL_COUNT;
     }
 }
 
diff --git a/src/main/rx/rx.c b/src/main/rx/rx.c
index 1233274461..5e5b0caae9 100644
--- a/src/main/rx/rx.c
+++ b/src/main/rx/rx.c
@@ -33,6 +33,8 @@
 
 #include "flight/failsafe.h"
 
+#include "drivers/gpio.h"
+#include "drivers/timer.h"
 #include "drivers/pwm_rx.h"
 #include "rx/pwm.h"
 #include "rx/sbus.h"
diff --git a/src/main/rx/sbus.c b/src/main/rx/sbus.c
index 06325f0a97..1f3d3828fc 100644
--- a/src/main/rx/sbus.c
+++ b/src/main/rx/sbus.c
@@ -21,6 +21,8 @@
 
 #include "platform.h"
 
+#include "build_config.h"
+
 #include "drivers/system.h"
 
 #include "drivers/serial.h"
@@ -142,6 +144,7 @@ bool sbusFrameComplete(void)
 
 static uint16_t sbusReadRawRC(rxRuntimeConfig_t *rxRuntimeConfig, uint8_t chan)
 {
+    UNUSED(rxRuntimeConfig);
     return sbusChannelData[chan] / 2 + SBUS_OFFSET;
 }
 
diff --git a/src/main/rx/spektrum.c b/src/main/rx/spektrum.c
index 736249d2eb..5c0a9afc8c 100644
--- a/src/main/rx/spektrum.c
+++ b/src/main/rx/spektrum.c
@@ -46,7 +46,7 @@ static bool rcFrameComplete = false;
 static bool spekHiRes = false;
 static bool spekDataIncoming = false;
 
-volatile static uint8_t spekFrame[SPEK_FRAME_SIZE];
+static volatile uint8_t spekFrame[SPEK_FRAME_SIZE];
 
 static void spektrumDataReceive(uint16_t c);
 static uint16_t spektrumReadRawRC(rxRuntimeConfig_t *rxRuntimeConfig, uint8_t chan);
diff --git a/src/main/rx/sumd.c b/src/main/rx/sumd.c
index bc32f54d71..ddea202485 100644
--- a/src/main/rx/sumd.c
+++ b/src/main/rx/sumd.c
@@ -21,6 +21,8 @@
 
 #include "platform.h"
 
+#include "build_config.h"
+
 #include "drivers/system.h"
 
 #include "drivers/serial.h"
@@ -57,6 +59,7 @@ void sumdUpdateSerialRxFunctionConstraint(functionConstraint_t *functionConstrai
 
 bool sumdInit(rxConfig_t *rxConfig, rxRuntimeConfig_t *rxRuntimeConfig, rcReadRawDataPtr *callback)
 {
+    UNUSED(rxConfig);
     sumdPort = openSerialPort(FUNCTION_SERIAL_RX, sumdDataReceive, SUMD_BAUDRATE, MODE_RX, SERIAL_NOT_INVERTED);
     if (callback)
         *callback = sumdReadRawRC;
@@ -131,5 +134,6 @@ bool sumdFrameComplete(void)
 
 static uint16_t sumdReadRawRC(rxRuntimeConfig_t *rxRuntimeConfig, uint8_t chan)
 {
+    UNUSED(rxRuntimeConfig);
     return sumdChannelData[chan] / 8;
 }
diff --git a/src/main/telemetry/msp.c b/src/main/telemetry/msp.c
index d025e9e4dd..62e7f40c87 100644
--- a/src/main/telemetry/msp.c
+++ b/src/main/telemetry/msp.c
@@ -27,6 +27,8 @@
 
 #include "platform.h"
 
+#include "build_config.h"
+
 #ifdef TELEMETRY
 
 #include "drivers/serial.h"
@@ -35,6 +37,7 @@
 
 void initMSPTelemetry(telemetryConfig_t *initialTelemetryConfig)
 {
+    UNUSED(initialTelemetryConfig);
 }
 
 void handleMSPTelemetry(void)